The Conservative members of the London Assembly have all signed a letter urging Boris Johnson to scrap the Western congestion charge.
Yet the letter comes in advance of the result of a public consultation and after Boris made it clear that he no longer favours a complete rollback of the scheme.
So if as expected the consultation produces a mixed response from West London residents, will Boris openly defy each and every one of his Conservative representatives?
The congestion charge has been consistently opposed by the Conservative Assembly members, and Boris had previously stated that he was opposed to the Western extension.
But with the realities of his statutory environmental responsibilities and with the threat of huge EU fines for air pollution on the horizon, the fact is that Boris may be forced to openly defy his own side.
Of course Boris can afford to offend the Tory Assembly members. And an adapted charge would help appease at least some of those who are now opposed.
But with his election partly dependant on a promise to scrap the extension, would there be more than just a few politicians who would feel betrayed by a retreat?